Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Alternators - BOSCH: Specifications: Notes
Alternator output specifications are explained within the type designation code stamped on alternator.
| K - | Diameter of Stator Frame: | |
| G - 3.94-4.29" | Q - 5.49-6.66" | |
| (100-109 mm) | (140-169 mm) | |
| J - 4.30-4.69" | T - 6.67-7.84" | |
| (110-119 mm) | (170-199 mm) | |
| K - 4.70-5.48" | U - Over 7.85" | |
| (120-139 mm) | (200 mm) | |
| 1 - | Type of Alternator: | |
| 1 - Claw-pole | 3 - Permeable-rotor | |
| 2 - Single-pole | 4 - Claw-pole with exciter | |
| (RL) - | Direction of rotation: | |
| R - Right (Clockwise) | RL - Either Direction | |
| L - Left (Counterclockwise) | ||
| An arrow may also indicate direction of rotation. | ||
| 14V - | Alternator operating voltage. | |
| 35A - | Maximum current output in amperes. | |
| 20 - | RPM in hundreds at 2/3 of maximum current output (Rated Amp. Output) | |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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